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Finding the Fourth Proportional to 90,412.65, 124,769.49 and 50,126.91

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Solution

The fourth proportional to 90,412.65, 124,769.49 and 50,126.91 is: 69,175.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,412.65 : 124,769.49 = 50,126.91 : x
  2. Step 2: Convert to fraction form
    90,412.65/124,769.49 = 50,126.91/x
  3. Step 3: Cross multiply
    90,412.65x = 124,769.49 × 50,126.91
  4. Step 4: Simplify right side
    90,412.65x = 6,254,308,995.98
  5. Step 5: Solve for x
    x = 6,254,308,995.98/90,412.65
  6. Step 6: Final answer
    x = 69,175.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.